Introduction Of Magnetic Circuits In Electrical Engineering

A magnetic circuit consists of a structure composed for the most part of high permeability magnetic material. The presence of high peremeability material causes the magnetic flux to be confined to the path defined by the structure, the current in the electric circuit. The core is assumed to be composed of magnetic material.

Magnetic Circuits In Electrical Engineering :

Practically all electrical power machinery (e.g. transformer, generators, motors) depend for their operation upon the magnetism produced by the magnetic circuits. The closed path followed by magnetic flux is called magnetic circuit as shown in Fig. Just closed path followed by current is called electric circuits. There is a lot of difference between electric and magnetic circuit, discussed in this category of magnetic circuit.

A magnetic circuit consists of a structure composed for the most part of high permeability magnetic material. The presence of high peremeability material causes the magnetic flux to be confined to the path defined by the structure, the current in the electric circuit. The core is assumed to be composed of magnetic material, whose permeability is much greater than that of air. The core is of uniform cross-section and excited by a winding having N turns and carrying current of I amperes. This winding developes flux inside the core. The magnetic flux can be visualized in terms of flux lines.

Types Of Magnetic Materials

Question formed from this topic like :

Q: Explain the classification of magnetic materials. OR Types of magnetic materials as a magnetic core.

The magnetic materials have some kind of properties known as diamagnetic, paramagnetic or ferromagnetic.

Paramagnetic Materials

The materials, which are not strongly attracted by a magnet, such as aluminium, tin, platinum, magnesium, manganese etc. are known as paramagnetic materials. The relative permeability is small but positive.

Diamagnetic Materials

The materials which are repelled by a magnet such as zinc, mercury, lead, sulphur, copper, silver, bismuth, wood etc., are known as diamagnetic materials. The permeability is slightly less than unity.

Ferromagnetic Materials

The materials which are strongly attracted by a magnet such as iron, steel, nickel, cobalt, and some of their alloys, areknown as Ferromagnetic materials. The permeability is very high (Varying from several hundred to many thousands).

The Next important topic from Magnetic Circuits of basic Electrical Engineering is :

Explanation Of Terms Related To Magnetic Circuits In Electrical B.Tech.


MAGNETIC CIRCUITS TOPICS

  1. Introduction Of Magnetic Circuits In Electrical Engineering
  2. Explanation Of Terms Related To Magnetic Circuits In Electrical B.Tech.
  3. What is kirchhoff’s laws ? for magnetic circuit & How relate to electric circuit
  4. Compare Electric And Magnetic Circuit : Similarities & Dissimilarities
  5. Explain The Series Magnetic Circuit ? OR Composite Magnetic Circuits ?
  6. Kirchhoff’s laws for Magnetic Circuits : flux Law (KFL) & magnetomotive force Law (KML)
  7. what is Leakage Flux And Fringing in Magnetic Circuits
  8. B-H Curve Phenomena Of Magnetic Hysteresis With Effect And Loss

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